Drinking Water Ordinance
Products and components used in drinking water installations are subject to defined requirements relating to materials, hygienic properties and technical performance.
DVGW certificates document the assessment of defined requirements for the products covered by the respective certificate and within its stated scope. Depending on the product, these requirements may include the suitability of materials as well as relevant product characteristics in accordance with applicable technical rules, standards and DVGW codes of practice.
The specific certificate, its scope and the products, materials and assessment criteria stated within it are always decisive.
Consumer information
Drinking Water Regulations and German Environment Agency Assessment Criteria
The German Drinking Water Ordinance and the assessment criteria issued by the German Environment Agency define requirements for materials and components that come into contact with drinking water.
For metallic materials in contact with drinking water, the German Environment Agency publishes corresponding assessment criteria and material lists. These provide an important basis for evaluating hygienic suitability for drinking water applications.
For Schlösser Armaturen, these requirements form an important part of the selection and assessment of materials in contact with drinking water. The requirements and verification applicable to a specific product depend on its material, configuration and intended application.
BA Backflow Preventer: Protection of Drinking Water Installations
Pressure conditions within drinking water installations can cause liquids from connected systems or appliances to flow back towards the drinking water supply.
The BA backflow preventer from Schlösser Armaturen is designed to protect drinking water installations against such backflow. It is based on a three-chamber system with inlet, intermediate and outlet chambers as well as integrated non-return devices.
The backflow preventer is designed for protection against fluids up to and including fluid category 4 in accordance with DIN EN 1717. Installation and application must comply with the relevant technical specifications and applicable standards
Straightforward installation
The backflow preventer is designed for structured installation. Individual components and assemblies are pre-assembled.
In the version with an integrated draw-off valve, the component is installed according to its intended connection method. In the version designed for connection to an existing draw-off valve, installation begins by connecting the housing to the existing fitting.
The applicable installation and product documentation is always decisive.
Domestic Water Meters and Drinking Water Requirements
Water meters used in drinking water installations are subject to defined requirements relating to materials, hygiene, measuring performance and technical design.
Werner Schütz domestic water meters are manufactured and tested with reference to the applicable requirements of the German Drinking Water Ordinance and relevant technical rules.
The materials, coatings and manufacturing processes used are assessed and documented according to their respective application. The specific verification applicable to each water meter is stated in the current product information and certification documentation.
Water Meters for Municipal Water Supply
Water meters used in municipal water supply are also subject to defined requirements relating to materials, hygienic properties and measuring accuracy.
Schlösser Armaturen manufactures and tests Werner Schütz water meters at its Olpe site. Manufacturing and testing are carried out on the basis of defined technical and quality-related processes.
The relevant product and conformity documentation indicates which requirements are met within the respective scope.
DVGW – We Have Our Products Tested
What Does DVGW Certification Mean?
DVGW certificates document the assessment of defined requirements for the products covered and within the respective scope.
Depending on the product and certification procedure, this may include microbiological and chemical testing of materials as well as technical testing of product characteristics. These tests are carried out in accordance with the relevant certification requirements and by designated testing bodies.
If the defined requirements of the certification procedure are fulfilled, DVGW CERT GmbH may issue the corresponding certificate. Each certificate is uniquely assigned by its registration number and applies within its stated scope and validity period.
The specific certificate, the products listed within it and the underlying test and assessment criteria are always decisive.
Hygiene and Legionella Prevention
Legionella can multiply particularly where water remains stagnant for extended periods and suitable temperature conditions are present.
A drinking water installation that is properly planned, installed and operated can help reduce stagnation and minimise hygienic risks.
Constructive solutions designed to minimise dead spaces can help reduce areas of standing water within an installation. However, hygienic performance always depends on the interaction of planning, installation, operation, use and maintenance throughout the entire drinking water system.
Products and components should therefore always be used in accordance with their intended application and the applicable technical rules.